Wilde, who starred in TRON: Legacy and last year's movie In Time, has also been vocal about her sex life with Sudeikis, previously informing Us Weekly how they "have sex like Kenyan marathon runners.".

Sudeikis also credited other factors for his trim figure.

"A lot of it comes from tiny things, like not eating barbecue sauce with my pizza at two in the morning," he said.

"I think it's all a manifestation of being happy and wanting to treat myself well."

Wilde, 29, previously married to filmmaker and musician Tao Ruspoli, and 37-year-old Sudeikis plan to get married next year.

Charlie Day as Dale, Jason Sudeikis as Kurt and Jason Bateman in the comedy .Source:Supplied